5 node instance added

files/instances/5_nodes.dot

+digraph G {
+0;
+1;
+2;
+3;
+4;
+0 -> 1[label="1" weight="1"];
+1 -> 0[label="4" weight="4"];
+0 -> 2[label="3" weight="3"];
+2 -> 0[label="8" weight="8"];
+0 -> 3[label="5" weight="5"];
+3 -> 0[label="6" weight="6"];
+0 -> 4[label="2" weight="2"];
+4 -> 0[label="4" weight="4"];
+1 -> 2[label="4" weight="4"];
+2 -> 1[label="5" weight="5"];
+1 -> 3[label="9" weight="9"];
+3 -> 1[label="8" weight="8"];
+1 -> 4[label="7" weight="7"];
+4 -> 1[label="7" weight="7"];
+2 -> 3[label="8" weight="8"];
+3 -> 2[label="5" weight="5"];
+2 -> 4[label="3" weight="3"];
+4 -> 2[label="10" weight="10"];
+3 -> 4[label="7" weight="7"];
+4 -> 3[label="3" weight="3"];
+}